Bang is part metaphysical genre exposition is the style of Doom Patrol or the Invisibles and part genre pastiche.
A writer with an automatic writing machine is able to predict the future, or potential make pulp action heroes become real people. As his writing reveals the end of the world and the way to avoid it he attempts to fulfil the "final adventure" by bringing the subjects of his novels together into a "superteam".
Issue 1 features a take on James Bond where different people are essentially brainwashed with the same set of memories. An amusing explanation for the various Bonds and their different interpretations of the role. The other characters all refer to this character as a misogynistic sociopath but don't seem to hold that against the current incarnation which is a bit odd.
Issue 2 is a take on Die Hard with the John McClane character using inhalers to give himself superhuman abilities. The twist here is the antipathy the various terrorists have with the character that means he ends up in the Die Hard situations repeatedly. It's not as clever as the first issue but the character is more likeable and the powers more intriguing as a mystery but less genre appropriate.
Issue 3 seems a take on Knight Rider when the sentient AI car is deeply in the background compared to the main character who is a paralysed genius who has created a way for her to live a life as a kind of super spy. The character is really interesting but the pulp plot and gadgets just don't engage by comparison.
Issue 4 has a kind of Miss Marple/Poirot pastiche with a character who is a bit like Modesty Blaise in her youth. The whodunnit aspect is kind of interesting (with the suspects giving a suitably arch commentary on the detective's eccentric delivery) with an unexpectedly graphically violent conclusion. As this character has interacted with a previous incarnation of the James Bond character this issue works better on the different levels the story is working on. You have an exotic pulp character whose present and past she finds hard to reconcile while her memories of an exciting man in her past are difficult to reconcile with who that person became after their relationship ended and the current person claiming to be that man.
Issue 4 brings the action hero team together, essentially ending the first arc. It's pretty clear the next stage is a take on the crossover story but lurking in the background is strange meta-fictional universe and the meaning of the warring organisations.